Recent content by John Mulcahy

You can do that by adding the -api argument to the shortcut, as shown in The help.

The V5.40 beta builds should accept the files.

Once again: T20, T30, Topt and T60M all give figures for the time to decay by 60 dB. They differ in how they calculate the figure. None of them require 60 dB SNR. Your assumptions about the impact of the noise floor are wrong.

Builds updated today (beta 99) with these changes: Added: Measurements can be dragged and dropped from one REW instance to another Added: An application.properties bundle file Changed: Additional entries in these bundle properties files: audio, equaliser, graphs, measure Changed: Updates to...

Look in the View preferences at the Full scale sine rms is 0 dBFS setting. Full scale sine rms is 0 dBFS determines whether the rms level of a full scale sine wave is show as 0 dBFS or -3.01 dBFS. If this option is selected the rms level may be greater than 0 dBFS for some signal types, for...

In the Analysis preferences uncheck "Limit cal data boost to 20 dB". If Limit cal data boost to 20 dB is selected REW will limit the total gain applied to compensate for calibration data attenuation to 20 dB. This prevents excessive boosting of the noise floor in areas where the combined...

The signal levels are correct as they are. Perhaps the "Full scale sine rms is 0 dBFS" View preference is making you think otherwise.

The T60M figure, like all the RT figures, is the time to decay by 60 dB. It does not require a noise floor at -60 dB, nor do any of the other RT measures, such as T20 or T30. You misunderstand the process, which is explained in the help.

The requirement is for HP and LP with L-R shape, not L-T. If a filter is to be applied there needs to be something in the replay path that is capable of doing it, either an equaliser or a device which offers EQ.

Yes. You can choose the RT60 decay T60M parameter for the RT60 overlay just as you can choose any other.

That depends. RT60 is reflection decay time, but it is defined for spaces where the reflections are sufficiently dense to form a diffuse field. That's the case for large spaces, and for smaller spaces above a few hundred Hz, depending on how small. RP22 has seen fit to apply a different label...

You could just look at the ETC curve on the Filtered Impulse graph to see how long after the peak it is until the graph is below -60 dB. A difficulty with that is the graph may never get that low, depending on the noise levels and signal-to-noise ratio of the measurement. Longer sweeps can help...

That limit was part of the reason for developing the RT60 Decay processing.

Older versions are on the REW site history page.

The classic results are generated by choosing the same octave fraction on the RT60 graph.